Current-induced transverse spin wave instability in a thin nanomagnet

Details Current-induced transverse spin wave instability in a thin nanomagnet Current-induced transverse spin wave instability in a thin nanomagnet

2003-04-02

arxiv.org/abs/cond-mat/0304069v2

Phys. Rev. Lett. 92, 026602 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.92.026602

We show that an unpolarized electric current incident perpendicular to the
plane of a thin ferromagnet can excite a spin-wave instability transverse to
the current direction if source and drain contacts are not symmetric. The
instability, which is driven by the current-induced ``spin-transfer torque'',
exists for one current direction only.

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